On Thu, Mar 15, 2007 at 01:04:08PM +0000, replies-lists-a1z2-redhat@xxxxxxxxxxxxxxxxxxxxx wrote: > > > >> > Date: Thursday, March 15, 2007 11:24:13 AM +0000 > >> > From: Eur Ing Chris Green <cl@xxxxxxxx> > >> > To: fedora-list@xxxxxxxxxx > >> > Subject: rlogin sometimes hangs (from FC6 client) > >> > > >> > I have just moved to Fedora Core 6 on my desktop computer at work. > >> > We have a mixed environment of Windows PCs a few Linux ones and a > >> > number of Solaris target systems. > >> > > >> > When I rlogin from my new FC6 system to the Solaris systems the > >> > login sometimes just hangs, i.e. I type "rlogin crusade" and > >> > nothing happens for several minutes then I get a timeout message. > >> > > >> > This seems to happen only on the FC6 systems, I have tried it from > >> > one other FC6 system and it's the same but from a kubuntu > >> > installation (on the same sub-net) it doesn't happen. The rlogin > >> > hangs maybe one time in four or so, the other times it connects > >> > normally and works OK from then on. > >> > > >> > Does anyone have any ideas what might be causing this problem? > >> > >> this is generally a dns issue. > >> > >> the remote host tries to do a lookup of the inbound ipnumber. if > >> there isn't an in-addr.arpa entry for the ipnumber you'll get a > >> delay (which may be long enough for a timeout). additionally, if > >> access control on the remote system is by inbound hostname (which is > >> determined by a lookup against the inbound ipnumber), rather than > >> ipnumber, a lookup failure will result in your not getting access. > >> > >> note, this is the a dns lookup on the *ipnumber* of your fc6 system, > >> not a lookup by that machine's hostname. > >> > > Hmmm. This is all on a 10.x.x.x intranet at work. It uses NIS/YP for > > internal lookup and, as far as I can see, the systems in question all > > seem to be properly entered in the NIS database. > > > > on the remote system that you're trying to log in to try doing a dns > lookup of the ipnumber of the source machine and see what you get. > All 'dns' lookups for 'internal' systems fail, the only lookup tool on Solaris is nslookup and that specifically does a nameserver lookup and there's no 'internal' nameserver, everything gets found by using NIS. If I (for example) ping the IP address of the FC6 system from the Solaris system it always succeeds - well I did 100 or so and they all worked. -- Chris Green
